Dump bucket for pavers



H. J. EENTSON DUMP BUCKET FOR PAVERS Filed Nov. 8, 1920 2 Sheets-Sheet l H. J. BENTSON DUMP BUCKET FOR PAVERS Filed Nov. 8, 1920 2 Sheets-Sheet 2 Ill ' positive action at any mental Feb.2d,1925.

UNE'F STATE-d PATENT OFFEGE.

me BER'TSO'N, WINTHROP HARBOR, ILLINOIS, ASSIGNOR TO AUSTIN MA." CHINERY CORPORATION, OF CHIGAGO, ILLINOIS, A. CORPORATION OF ILLINOIS.

DUMP BUCKET FOE PAVERS.

Applicatioaflled November 8, 1920. Serial No. 422,423.

To all whom it concern:

Be it known that I, Hans J. BENTSON, a citizen of the United States, residing in Winthrop Harbor, in the county of Lake and State of Illinois, have invented a new and useful Improvement in Dump Buckets for Pavers, of which the following is a specification.

My invention has general reference to concrete distributing apparatus, such as is employed in paving machines of the socalled boom and bucket type, and relates more specifically to an improved distributing. or dumping bucketbonstruction and me us of operation in such apparatus.

t is a principal object ofthe invention to provide means whereby the discharge door of such a bucket maybe opened by int along the boom or runway, upon w ich the bucket is mounted, and whereby sliding action of.the door in closing will bring its inner surface into scraping contact with fixed parts of said bucket, thus removin any adhering concrete from the face of t e door opening or the door itself.

Another important object of the invention is the provision of means in such a bucket whereby a nick and ample opening may be provided or the discharge of the material at any desired point in the course of travel of said bucket.

A further object of the invention is the provision of a traveling dump bucket which has a discharge door operated by the same ower means which'move the bucket.

A still further object of the invention is the provision of a dump bucket of this general type which has means for preventing accidental opening of the discharge door by the inertia of the bucket upon its initial movement on the boom away from the source of supply.

it is also a furtherobjec t of the invention to provide a dump bucket serving the purposes set forth above, and having simply constructed and connected operative members which are certain and positive in action, and which maybe readily operated and controlled b ordinary workmen with a minimumof e ort.

Other objects and advantages of the invention will be apparent as it is better understood from the following description when ingbucket in which my invention is embodied, the same being shown in charging position on the boom; and

Fig. 2 is an end elevation thereof-L.

Inv the embodiment of my invention illustrated by the drawings, the body 11 of the bucket is of the bottom opening type, having preferably a relatively long transverse opening for a purpose which will hereinafter more clearly appear. The top 16 of the bucket is open and adapted to receive a charge from the spout or chute 17 on a concrete mixer.

.The bucket has walls 18 preferably in clined inwardly to a discharge opening 19. This opening is closed by a bottom or discharge door 21 which is pivoted on an axis 22 extending through a bearing 23 attached to the bottom of the door. Said door is adjustably connected, by means of a slide 24: held by set screws 25 and controlled by a threaded boss 26 upon a screw bolt 27, to the lower extensions of bell cranks 28 positioned on opposite sides of the bucket. This adjustment permits keeping the door always in firm contact with the lower walls regardless of any loosening of the parts in service, thus preventing the escape-of any concrete before opening, and also maintaining an exact relation between. the door and certain fixed parts of the bucket, the importance of which in the closing operation will be presently described.

The bell cranks 28 are pivoted upon the body of the bucket at 29 in any suitable manner, and have their upper extensions at tached by pins or other axial connectons 31 to arms or connectin rods 32, the upper ends of which are similarly attached to upper bell cranks 33. These bell cranks are pivoted at 34 to the supporting members 1 and, as shown in Fig. 2, they intersect said members so that the upper extensions are within and the lower ones on the outside of them. A cable 35 is attached in any appropriate way to a rod or shaft 36 extending between the said supporting members and connecting the elbows of the u per bell cranks. The purpose of this ca le is to move the bucket upon the boom away from the place of filling to a point of discharge. A second cable 37 is attached in the same manner to a rod 38 connecting the upper extremities of said bell cranks. This cable.

When the desired point of discharge is reached, the door may be opened by retarding the-cable 37-"and continuing to pull the cable 35, thereby tripping the bell crank 33 and exerting leverage through the arm 32 on bell crank 28, whichis also tripped, sliding the door from under the bottom open ing 19, and permitting the material to discharge. About the opening 19 is a wall 40 which inclines in the direction of door movement. When the axis 22 has swung clear of said wall, the door will swing thereon, the inner portion dropping down under the weight of the discharging loadand providing a quick and full opening for the emission thereof. This position is maintained while the cable 37 is held stationary, as de scribed above, during the continuation of the pull on 'cable35. When the cable 37 is released, the door moves back in a defined path to closed position. It said door is properly adjusted, the efl'ert of its natural movement upon said axis as the bell crank 28 returns to normal position, is to cause a sliding or scraping action against the edges of the wall 40 of the opening, thereby tending to remove any adhering concrete from said edges or the door itself. This is a very important feature, adding greatly to the efficiency of constructions used for this purpose and, it is believed, has never before been successfully attained.

A further practical and novel feature of importance should be here noted. Since the bottom opening is of rather long rectangular shape it is possible for theoperator to allow the bucket to slide back while dumping and thus to spread the concrete to proper thickness.

The bucket may be returned to the charging point by pulling on the line 37, and is then ready to receive another charge, the door having been restored to normal closed position. Awedge shaped piece 39 is attached to the boom in any suitable manner at the point where the bucket must be positioned for charging. It engages rollers 41 attached to the upper extensions of the bell cranks 33 when the bucket is moved to such position. The purpose of this arrangement is to hold the door closed while the bucket is being charged and to prevent accidental partial opening of the door, which might otherwise result from the jar'caused by the inertia of the bucket when power is applied to start it out upon the boom. Movement of said door is thereby made imposble until the bucket has passed beyond the length of the piece 39, and, the inertia having then been overcome, it can be opened only by tripping the upper bell crank 33 in the manner hereinbefore described.

The practical benefits of my construction combining effective means for proyiding a quick and ample opening for the discharge of the contents of a dump bucket at any point along its course of travel, means for closing said bucket in such manner as to remove any material adhering to the bottom parts thereof, and means for preventing accidental opening of the door, it is believed. Will be fully appreciated by those skilled in the art.

7 It is thought that the invention and many of its attendant advantages will be understood from the foregoing description, and it will be apparent that various changes may be made in the form, construction and arrangement of the parts without departing from the spirit and scope of the invention or sacrificing all of its material advantages, the form hereinbefore described being merely a preferred embodiment thereof.

I claim:

1. A dumping bucket for pavers, comprising a body having a bottom discharge opening, a bottom closing said opening, bell cranks journaled on the sides of the bucket and pivotally connected with said bottom about an intermediate transverse axis, and means for moving the bucket to and from charging position, said means operating said bell-cranks to move the lower arms thereof to position permitting said bottom to turn on itspivotal axis to automatically dump the load.

2. A dumping bucket for pavers, comprising a body having a bottom discharge opening, a bottom closing said opening, bellcranks journaled on the sides of the bucket and pivotally connected with said bottom about an intermediate transverse axis, and cable controlled means through which power is applied to said bell-cranks to move the lower arms thereof from beneath the walls of said opening to permit said bottom to turn on its pivotal axis to automatically dump the load, said bottom bein closable with a scraping action against sai walls.

3. A dumping bucket for payers, comprising a body having a bottom discharge opening, a bottom closing said opening, bell cranks journaled on the sides of the bucket and pivotally connected with said bottom about an intermediate'transverse axis therelll) of, and cable controlled ower operated means for actuatin said bel -cranks to shift the pivot point 0? said bottom from beneath the walls of said opening to permit automatic dumpin of the load, said bottom having ,a sliding action against said walls in closing whereby material adhering to the bottom walls is removed.

4. A dumping bucket for pavers, comprising a body having a bottom discharge opening, a bottom closing said 0 ening, bellcranks journaled on the sides 0 the bucket and pivotally connected with said bottom,

a bail for the bucket, other bell-cranks journale'd to said bail and adapted for power operation, and links connecting said bellcranks whereby said 0 ration shifts said door to a position causing it to turn on its pivotal axis to permit discharge of the load.

5. A dumping bucket for pavers, comprising a body havin a bottom discharge opening, a bottom closing said opening, bellcranks journaled on thesides of the bucket and pivotally connected with said bottom, a bail for the bucket, other bell-cranks journaled to said bail and adapted for power operation, and links connecting said bellcranks whereby said operation shifts said door to a position causing it to turn on its pivotal axis to emit discharge of the load, said bottom being closable with a scraping action against-the walls of said opening.

6. 'A dumping bucket for pavers, comprising a body having converging side walls,

and a vertical wall portion, the bottom there-- of defining a dischar e opening, a pivoted door movable to and lrom position beneath said opening and having a sliding action against said vertical wall portion in closing whereby material adhering to the door or walls is removed and cable controlled means for moving said bucket and opening said door.

7. In a concrete paving machine, the combination of a dumping buckethaving a relatively long transverse slidable bottom discharge opening of restricted width, a bottom closing said opening, a support for said bucket, means for moving the bottom ,from beneath said opening to permit discharge of the load, and means for moving the. bucket upon said support while the load is discharging to cause spreading of the material to desired thickness upon the surface to be paved.

8. In a concrete paving machine, the combination of a dumping bucket having a body and a rectangular bottom opening elongated transversely with respect to the front-tobac-k dimension, slidable means normally closing said opening and movable to permit discharge of the load, a support upon which the bucket is adapted to travel, and means for moving the bucket upon said support while the load is being discharged to spread the material upon the surface to be paved.

9. In a concrete paving machine, the combination of a boom and a bucket movable back and forth thereon, and having a bottom discharge opeing. a door closing said opening, bell-cranks journaled on the bucket and having lower arms pivotally connectedwith said door, means for supporting the bucket for movement on said boom, upper bellcranks journaled on said supporting means and connected .for operation of said firstmentioned bell-cranks, and cables connected with said upper bell-cranks for moving the bucket upon the boom and for tripping said bell-cranks to open said door.

10. A dumping bucket for pavers, comprising a body having a bottom discharge opening, a bottom closing said opening, operating connections journaled on the sidesof the bucket above the approximate center said bottom, and cable controlled power operated means for shifting the pivot point of the bottom to a point permitting said bottom to automatically turn on its pivotal axis to permit discharge of the load.

11. A dumping bucket for pavers, comprising, a body having a bottom wall opening, a door having both a sliding and a pivotal movement in opening and closing, and cable controlled means for controlling the opening and closing movement of said door.

12. A dumping bucket for pavers, comprising a body having a bottom wall opening, a door having both a sliding and a pivotal movement in opening and closing. and cable controlled means for moving said bucket and opening said door.

HANS J. BENTSON.

of the opening and pivotally connected with 

